<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        a {
            text-decoration: none;
        }

        div {
            width: 1100px;
            height: 100px;
            background-color: #000;
            position: absolute;
            top: 50%;
            left: 50%;
            margin-top: -50px;
            margin-left: -550px;
        }

        .container>a {
            /* display: block; */
            float: left;
        }

        .container nav {
            float: right;
            margin-right: 45px;
        }

        .container nav>a {
            float: left;
            color: #fff;
            font-size: 24px;
            line-height: 100px;
            margin-left: 65px;
        }
    </style>
</head>

<body>
    <div class="container">
        <a href="#"><img src="images/mclogo.jpg" alt=""></a>
        <nav>
            <a href="#">课程</a>
            <a href="#">职业路径</a>
            <a href="#">实战</a>
            <a href="#">猿问</a>
            <a href="#">手记</a>
        </nav>
    </div>
    <meter value="50" min="0" max="100" low="60" high="80" optimum="75"></meter>
    <meter value="0.6"></meter>
    <progress value="80" max="100"></progress>
    <input placeholder="请选择" list="phoneList">
    <datalist id="phoneList">
        <option value="iphone">iphone</option>
        <option value="iphone">iphone</option>
        <option value="iphone">iphone</option>
        <option value="iphone">iphone</option>
    </datalist>
    <details>
        <summary>你好</summary>
        <p>
            adfaasafadgaasdgadfagasdgagasda
        </p>
    </details>

    <p>
        <ruby>

            你<rp>(</rp>
            <rt>ni</rt>
            <rp>)</rp>
        </ruby>
        好
    </p>
</body>

</html>